WASHINGTON (CNN) – Politicians make a lot of ambitious election-year promises, but Thursday night, Barack Obama is making a few he might have some trouble keeping: if elected president, he’ll rename the tenth month of the year "Barack-tober" and choose Oprah Winfrey as his vice president.

The Illinois senator floats these and eight other "campaign promises" tonight as he counts down the daily Top Ten list on "The Late Show with David Letterman."

The most recent in a series of candidates to yuck it up on a late-night talk show, Sen. Obama will also propose putting Regis on the nickel and appointing Mitt Romney "secretary of lookin' good."

In the pre-taped segment of The Late Show, Obama warned Letterman not to try to "muss [his] hair," like the talk show host did to John Edwards when he appeared on the show Tuesday.